Novel distributor of methyl methacrylate (MMA) reactor

Abstract

A novel distributor of a methyl methacrylate (MMA) reactor is mainly composed of a gas inlet header pipe, branch pipes, distribution pipes and a coating, the gas inlet header pipe is connected with the branch pipes of the novel distributor, the branch pipes are connected with the distribution pipes, and material gas reaches the branch pipes through the gas inlet header pipe and then reaches the distribution pipes through the branch pipes. And the gas enters the reactor from the distribution pipe, so that the uniform distribution effect is realized. The novel distributor is characterized in that each group of distribution pipes of the novel distributor has three different directions, the included angle between the two upper distribution pipes is 60 degrees, the lower distribution pipes are vertically downward, the upward distribution pipes reduce airflow resistance, but part of catalyst leaks into the pipes, and the downward distribution pipes can enable the leaked catalyst to flow out, so that long-time accumulation in the pipes is avoided, and the catalyst leakage rate is reduced. And blocking the distribution pipe and the branch pipe.

Description

Technical Field

[0001] The utility model relates to the field of chemical industry, and further relates to a novel distributor for a methyl methacrylate (MMA) reactor. Background Art

[0002] Methyl methacrylate (MMA), also known as methyl methacrylate, is an organic compound. It is a colorless liquid, slightly soluble in water and soluble in most organic solvents such as ethanol. It is mainly used as a monomer for organic glass and is also used in the manufacture of other resins, plastics, coatings, adhesives, lubricants, impregnants for wood and cork, paper polishes, etc.

[0003] Methanol is an organic compound and the simplest saturated monohydric alcohol. It is commonly used as a solvent, antifreeze, fuel, etc. In modern industry, methanol has become the main raw material for organic synthesis.

[0004] The utility model is applied to a reactor for producing methyl methacrylate (MMA) from methanol, and solves the problem of catalyst blocking a distributor in the production process, and simultaneously solves the problems of uneven distribution and severe wear of the distributor. Utility Model Content

[0005] The purpose of this utility model is to provide a new distributor for a methyl methacrylate (MMA) reactor. Applied to the production of MMA from methanol, it aims to address the problem of catalyst clogging the distributor during production, as well as the problem of uneven distribution of methanol and other material gases causing biased flow during the vulcanization process and severe distributor wear.

[0006] The technical solution of the utility model is as follows:

[0007] The utility model provides a novel distributor for a methyl methacrylate (MMA) reactor, which mainly consists of four parts: an air inlet main pipe, a branch pipe, a distribution pipe and a coating.

[0008] The material gas enters the new distributor from the main air inlet pipe, the main air inlet pipe is connected to the branch pipe of the new distributor, the branch pipe is connected to each distribution pipe, the material gas reaches the branch pipe through the main air inlet pipe, and then reaches each distribution pipe from the branch pipe, and enters the reactor from the distribution pipe to achieve uniform distribution.

[0009] The branch pipes of the new distributor are vertically distributed to the air intake main pipe and are connected to the surrounding branch pipes by an air intake main pipe.

[0010] Each group of distribution pipes of the new distributor has three different directions. The angle between the two upper distribution pipes is 60°, and the lower one is vertically downward. The upward distribution pipe reduces the airflow resistance, but some catalyst will leak into the pipe. The downward distribution pipe can flow out the leaked catalyst to avoid long-term accumulation in the pipe and blockage of the distribution pipe and branch pipe.

[0011] The two upward distribution pipes of the new distributor are insertion pipes, one end of which is inserted below the center line of the branch pipe to avoid airflow disturbance between the distribution pipes. The downward distribution pipe is not an insertion pipe and is welded smoothly to the branch pipe to avoid blocking the outflow of the catalyst.

[0012] The outer layer of the new distributor is covered with an anti-coking and anti-wear coating using powder metallurgy to prevent the catalyst from adhering to the surface of the distributor.

[0013] The innovative features of this utility model are:

[0014] 1) A new distributor for a methyl methacrylate (MMA) reactor is provided. The distribution pipes are arranged in groups, and each group is equipped with three distribution pipes in different directions.

[0015] 2) The three distribution pipes in different directions of the new distributor are inserted to different depths. The two upward distribution pipes are inserted below the center line of the branch pipe to avoid airflow disturbance between the distribution pipes. The downward distribution pipe is not inserted and is welded to the branch pipe in a flat and smooth manner to avoid blocking the outflow of the catalyst.

[0016] 3) The outer layer of the new distributor is covered with an anti-coking and anti-wear coating using powder metallurgy to prevent the catalyst from adhering to the surface of the distributor, and powder metallurgy is used to prevent the coating from being partially peeled off. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Attachment Figure 1 :Schematic diagram of a new distributor structure for a methyl methacrylate (MMA) reactor

[0018] in:

[0019] 1: Reactor outer wall 2: Inlet manifold 3: Branch pipe

[0020] 4: Distribution pipe 5: Coating DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the embodiments, but the present invention is not limited by the embodiments.

[0022] Example

[0023] New distributor for 100,000 tons / year methanol production of methyl methacrylate (MMA) reactor

[0024] The main body material of the new distributor is S30408 ​​+ anti-coking and anti-wear coating. The total diameter of the distributor is 2200mm, the diameter of the main air intake pipe is 250mm, the diameter of the branch pipe is 80mm, and the diameter of the distribution pipe is 8mm.

[0025] The mixture of methanol and methyl propionate enters the reactor through the main air intake pipe, then enters the branch pipe through the main air intake pipe, and then enters the reactor through the branch and distribution pipes. The airflow is stable, the catalyst sulfide state is stable, there is no blockage, and after testing, no obvious wear is observed on the surface.

Claims

1. A novel distributor for a methyl methacrylate (MMA) reactor, characterized in that It mainly consists of four parts: the air intake main pipe, branch pipes, distribution pipes and coating. The distribution pipes are arranged in groups, and each group is equipped with three distribution pipes in different directions. Each group of distribution pipes consists of three distribution pipes in different directions. The insertion depth of each distribution pipe is different. The two upward distribution pipes are inserted below the center line of the branch pipes, and the downward distribution pipe is not inserted and is welded smoothly to the branch pipes.

2. a kind of methyl methacrylate (MMA) reactor novel distributor according to claim 1, is characterized in that The new distributor is covered with an anti-coking and anti-wear coating.

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